[dpdk-dev] [PATCH v3 12/46] net/liquidio: add API for VF FLR

[Shijith Thotton <shijith.thotton@caviumnetworks.com>]

VF sends Function Level Reset request to PF using mbox and PF does the
reset.

Signed-off-by: Shijith Thotton <shijith.thotton@caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Venkat Koppula <venkat.koppula@caviumnetworks.com>
Signed-off-by: Srisivasubramanian S <ssrinivasan@caviumnetworks.com>
Signed-off-by: Mallesham Jatharakonda <mjatharakonda@oneconvergence.com>
---
 drivers/net/liquidio/base/lio_23xx_vf.c | 19 +++++++++++++++++++
 drivers/net/liquidio/base/lio_23xx_vf.h |  2 ++
 drivers/net/liquidio/base/lio_mbox.h    |  1 +
 drivers/net/liquidio/lio_ethdev.c       |  5 +++++
 4 files changed, 27 insertions(+)

diff --git a/drivers/net/liquidio/base/lio_23xx_vf.c b/drivers/net/liquidio/base/lio_23xx_vf.c
index 6270af5..ed5b830 100644
--- a/drivers/net/liquidio/base/lio_23xx_vf.c
+++ b/drivers/net/liquidio/base/lio_23xx_vf.c
@@ -255,6 +255,25 @@
 	return 0;
 }
 
+void
+cn23xx_vf_ask_pf_to_do_flr(struct lio_device *lio_dev)
+{
+	struct lio_mbox_cmd mbox_cmd;
+
+	mbox_cmd.msg.mbox_msg64 = 0;
+	mbox_cmd.msg.s.type = LIO_MBOX_REQUEST;
+	mbox_cmd.msg.s.resp_needed = 0;
+	mbox_cmd.msg.s.cmd = LIO_VF_FLR_REQUEST;
+	mbox_cmd.msg.s.len = 1;
+	mbox_cmd.q_no = 0;
+	mbox_cmd.recv_len = 0;
+	mbox_cmd.recv_status = 0;
+	mbox_cmd.fn = NULL;
+	mbox_cmd.fn_arg = 0;
+
+	lio_mbox_write(lio_dev, &mbox_cmd);
+}
+
 static void
 cn23xx_pfvf_hs_callback(struct lio_device *lio_dev,
 			struct lio_mbox_cmd *cmd, void *arg)
diff --git a/drivers/net/liquidio/base/lio_23xx_vf.h b/drivers/net/liquidio/base/lio_23xx_vf.h
index 83dc053..ad8db0d 100644
--- a/drivers/net/liquidio/base/lio_23xx_vf.h
+++ b/drivers/net/liquidio/base/lio_23xx_vf.h
@@ -87,6 +87,8 @@
 
 #define CN23XX_VF_BUSY_READING_REG_LOOP_COUNT	100000
 
+void cn23xx_vf_ask_pf_to_do_flr(struct lio_device *lio_dev);
+
 int cn23xx_pfvf_handshake(struct lio_device *lio_dev);
 
 int cn23xx_vf_setup_device(struct lio_device  *lio_dev);
diff --git a/drivers/net/liquidio/base/lio_mbox.h b/drivers/net/liquidio/base/lio_mbox.h
index f1c5b8e..b0875d6 100644
--- a/drivers/net/liquidio/base/lio_mbox.h
+++ b/drivers/net/liquidio/base/lio_mbox.h
@@ -43,6 +43,7 @@
 #define LIO_MBOX_DATA_MAX			32
 
 #define LIO_VF_ACTIVE				0x1
+#define LIO_VF_FLR_REQUEST			0x2
 #define LIO_CORES_CRASHED			0x3
 
 /* Macro for Read acknowledgment */
diff --git a/drivers/net/liquidio/lio_ethdev.c b/drivers/net/liquidio/lio_ethdev.c
index bebe0e8..5aae105 100644
--- a/drivers/net/liquidio/lio_ethdev.c
+++ b/drivers/net/liquidio/lio_ethdev.c
@@ -112,6 +112,11 @@
 	if (cn23xx_pfvf_handshake(lio_dev))
 		goto error;
 
+	/* Initial reset */
+	cn23xx_vf_ask_pf_to_do_flr(lio_dev);
+	/* Wait for FLR for 100ms per SRIOV specification */
+	rte_delay_ms(100);
+
 	if (cn23xx_vf_set_io_queues_off(lio_dev)) {
 		lio_dev_err(lio_dev, "Setting io queues off failed\n");
 		goto error;
-- 
1.8.3.1